EFR(GBSS16.0_01)

GSM BSS GBSS16.0

EFR Feature Parameter Description Issue

01

Date

2014-04-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

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Website:

http://www.huawei.com

Email:

[email protected]

Issue 01 (2014-04-30)

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

i

GSM BSS EFR Feature Parameter Description

Contents

Contents 1 About This Document..................................................................................................................1 1.1 Scope..............................................................................................................................................................................1 1.2 Intended Audience..........................................................................................................................................................1 1.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................3 2.1 Introduction....................................................................................................................................................................3 2.2 NEs Supporting the Feature............................................................................................................................................3

3 Technical Description...................................................................................................................4 3.1 Improvement of EFR on FR and HR..............................................................................................................................4 3.2 E-Coder...........................................................................................................................................................................4

4 Engineering Guidelines...............................................................................................................6 4.1 Deploying Enhanced Full Rate.......................................................................................................................................6 4.1.1 Deployment Requirements..........................................................................................................................................6 4.1.2 Precautions...................................................................................................................................................................6 4.1.3 Activation....................................................................................................................................................................7 4.1.4 Activation Observation................................................................................................................................................8 4.1.5 Deactivation.................................................................................................................................................................8

5 Parameters.....................................................................................................................................10 6 Counters........................................................................................................................................17 7 Glossary.........................................................................................................................................18 8 Reference Documents.................................................................................................................19

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1 About This Document

1

About This Document

1.1 Scope This document describes the GBFD-113301 Enhanced Full Rate feature, including its technical principles and engineering guidelines.

1.2 Intended Audience This document is intended for personnel who: l

Need to understand the features described herein

l

Work with Huawei products

1.3 Change History This section provides information about the changes in different document versions. There are two types of changes, which are defined as follows: l

Feature change Changes in features of a specific product version

l

Editorial change Changes in wording or addition of information that was not described in the earlier version

01 (2014-04-30) This issue does not include any changes.

Draft A (2014-01-23) Compared with Issue 01 (2013-05-06) of GBSS15.0, Draft A (2014-01-23) of GBSS16.0 includes the following changes. Issue 01 (2014-04-30)


1


1 About This Document

Change Type

Change Description

Parameter Change

Feature change

The BSC6910 supports the E-Coder function. Accordingly, the descriptions in the following contents are modified:

None

l 3.2 E-Coder l 4.1.2 Precautions Editorial change

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None


None

2


2 Overview

2

Overview

2.1 Introduction With the development of GSM networks, subscribers have increasing requirements for high speech quality. To meet the requirements, the enhanced full rate (EFR) is adopted. Compared with FR, EFR optimizes the speech codec algorithm and therefore improves the speech quality and user experience.

2.2 NEs Supporting the Feature Table 2-1 NEs supporting the feature Feature

BSC6900

BSC6910

GBTS

eGBTS

Enhanced Full Rate

√

√

√

√

NOTE

√ indicates that the NE supports this feature. × indicates that the NE does not support this feature.

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3 Technical Description

3

Technical Description

3.1 Improvement of EFR on FR and HR EFR is implemented on the basis of the Code Excited Linear Prediction (CELP). FR and HR, however, are implemented on the basis of Regular Pulse Excited - Linear Predictive Coder (RPELPC). The differences between CELP and RPE-LPC are as follows: In the CELP model, the excitation signal is a quantified vector. A group of codevectors that are calculated in advance form a code book. For each frame of speech signals, a codevector with the minimum perceptually weighted error is selected from the code book to serve as the irregular excitation source. In the RPE-LPC model, a regular excitation source, such as a sine wave is adopted, and therefore the voice sounds unnatural. The VOICEVER(BSC6900,BSC6910) parameter specifies whether to enable EFR. The EFR feature can be enabled forcibly on the BSC. That is, when the BSC determines that the circuit pool on the A interface and the MS support the EFR, the BSC can forcibly select the EFR as the speech version to improve the speech quality if the speech versions carried in the Assignment Request message do not include the EFR. The FORCEDCELLEFRSWITCH (BSC6900,BSC6910) parameter specifies whether the EFR feature can be forcibly enabled.

3.2 E-Coder Enhanced Coding (E-Coder) optimizes AMR coding modules, improving AMR speech quality. EFR codec and AMR codec has been integrated. Therefore, the E-Coder optimization is also applicable to EFR and improves EFR speech quality. The emulation results show that E-Coder improves the MOS by 0.05 to 0.12. However, it introduces an algorithm delay of 5 ms to an EFR encoder. The BSC does not support the ECoder function in the following TC-free scenarios: l

The A interface uses IP transmission.

l

The Tandem Free Operation (TFO) feature is enabled.

l

The BSC Local Switch or BTS Local Switch feature is enabled.

E-Coder is supported only in the downlink. Issue 01 (2014-04-30)


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3 Technical Description

The E-Coder function can be enabled only when EncodeMode(BSC6900,BSC6910) is set to ECODEC(Enhanced code mode).

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4 Engineering Guidelines

4

Engineering Guidelines

4.1 Deploying Enhanced Full Rate 4.1.1 Deployment Requirements Table 4-1 Deployment requirements Aspect

Requirement

Related features

None

BSC

None

BTS

None

GSM networking

None

MS

MSs support EFR.

MSC

None

License

None

Others

None

4.1.2 Precautions In A over IP mode, the EFR and E-Coder cannot be forcibly enabled. The BSC does not support the E-Coder function in the following TC-free scenarios: l

The Tandem Free Operation (TFO) feature is enabled.

l

The BSC Local Switch or BTS Local Switch feature is enabled.

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4.1.3 Activation Using MML Commands Step 1 On the BSC LMT, run the SET GCELLCCACCESS command with Speech Version set to FULL_RATE_VER1(Full-rate VER 1) and FULL_RATE_VER2(Full-rate VER 2). Step 2 (Optional) To forcibly enable the EFR, run the SET GCELLSOFT command with Allow Forced EFR in Cell set to YES(Yes). Step 3 (Optional) To enable the E-Coder for better speech quality, run the SET TCPARA command on the BSC LMT with its parameters set as follows: l Set Subrack No. and Slot No. to the actual subrack number and slot number of the DPU board. l Set Coding Mode to ECODEC(Enhanced code mode). ----End

MML Command Examples //Activating EFR SET GCELLCCACCESS: IDTYPE=BYID, CELLID=0, VOICEVER=FULL_RATE_VER1-1&FULL_RATE_VER2-1&FULL_RATE_VER3-0&HA LF_RATE_VER1-0&HALF_RATE_VER2-0&HALF_RATE_VER3-0&FULL_RATE_VER 5-0; //Enabling EFR forcibly SET GCELLSOFT: IDTYPE=BYID, CELLID=0, FORCEDCELLEFRSWITCH=YES; //Activating the enhanced code mode SET TCPARA: SRN=0, SN=9, EncodeMode=ECODEC;

Using the CME NOTE

When configuring the EFR feature on the CME, you must perform a single configuration first, and then perform batch modifications if required. You must perform a single configuration for a parameter before batch modifications of the parameter. You are advised to perform batch modifications before logging out of the parameter setting interface.

Step 1 Configure a single object on the CME. (CME single configuration) Set parameters on the CME configuration interface according to the operation sequence described in Table 4-2. For the method of performing the CME single configuration, see CME Single Configuration Operation Guide. Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center) icon on the To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the CME configuration interface to start the batch modification wizard. For the method of Issue 01 (2014-04-30)


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performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End Table 4-2 Configuring parameters on the CME SN

Managed Object (MO)

NE

Parameter Name

Parameter ID

Configurable in CME Batch Modification Center

1

GCELLCC ACCESS

BSC6900/ BSC6910

Speech Version

VOICEVER

Yes

2 (Optio nal)

GCELLSO FT

BSC6900/ BSC6910

Allow Forced EFR in Cell

FORCEDCEL LEFRSWITC H

Yes

3 (Optio nal)

TCPARA

BSC6900/ BSC6910

Coding Scheme

EncodeMode

No

4.1.4 Activation Observation Step 1 During a dialing test or a call, run the DSP CALLRES command on the BSC LMT with User Identity Type set to BYMSISDN(By MSISDN) and MSISDN set to the ISDNs of MS 1 and MS 2 in the call. Step 2 In the command output, view the value of Channel Service Type under the TC Resource Info field. Expected result: The value of Channel Service Type is EFR. ----End

4.1.5 Deactivation Using MML Commands On the BSC LMT, run the SET GCELLCCACCESS command with Speech Version set to values other than FULL_RATE_VER2(Full-rate VER 2).

MML Command Examples //Deactivating EFR SET GCELLCCACCESS: IDTYPE=BYID, CELLID=0, VOICEVER=FULL_RATE_VER1-1&FULL_RATE_VER2-0&FULL_RATE_VER3-0&HA LF_RATE_VER1-0&HALF_RATE_VER2-0&HALF_RATE_VER3-0&FULL_RATE_VER 5-0; Issue 01 (2014-04-30)


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Using the CME NOTE

When configuring the EFR feature on the CME, you must perform a single configuration first, and then perform batch modifications if required. You must perform a single configuration for a parameter before batch modifications of the parameter. You are advised to perform batch modifications before logging out of the parameter setting interface.

Step 1 Configure a single object on the CME. (CME single configuration) Set parameters on the CME configuration interface according to the operation sequence described in Table 4-3. For the method of performing the CME single configuration, see CME Single Configuration Operation Guide. Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center) icon on the To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the CME configuration interface to start the batch modification wizard. For the method of performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End Table 4-3 Configuring the parameter on the CME

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SN

MO

NE

Parameter Name

Parameter ID

Configurabl e in CME Batch Modificatio n Center

1

GCELLCC ACCESS

BSC6900& BSC6910

Speech Version

VOICEVE R

Yes


9


5 Parameters

5

Parameters

Table 5-1 Parameter description Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

VOICEVER

BSC6900

SET GCELLCCAC CESS

MRFD-210301

Configuration Management

Meaning:Speec h version supported by a cell. Note: This parameter must support full-rate version 1. GUI Value Range:FULL_R ATE_VER1 (Full-rate VER 1), FULL_RATE_ VER2(Full-rate VER 2), FULL_RATE_ VER3(Full-rate VER 3), HALF_RATE_ VER1(Half-rate VER 1), HALF_RATE_ VER2(Half-rate VER 2), HALF_RATE_ VER3(Half-rate VER 3), FULL_RATE_ VER5(Full-rate VER 5) Unit:None

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Parameter ID

NE

5 Parameters

MML Command

Feature ID

Feature Name

Description Actual Value Range:FULL_R ATE_VER1, FULL_RATE_ VER2, FULL_RATE_ VER3, HALF_RATE_ VER1, HALF_RATE_ VER2, HALF_RATE_ VER3, FULL_RATE_ VER5 Default Value:FULL_R ATE_VER1:1,F ULL_RATE_V ER2:1,FULL_R ATE_VER3:0, HALF_RATE_ VER1:1,HALF _RATE_VER2: 0,HALF_RATE _VER3:0,FULL _RATE_VER5: 0

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5 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

VOICEVER

BSC6910

SET GCELLCCAC CESS

MRFD-210301

Configuration Management

Meaning:Speec h version supported by a cell. Note: This parameter must support full-rate version 1. GUI Value Range:FULL_R ATE_VER1 (Full-rate VER 1), FULL_RATE_ VER2(Full-rate VER 2), FULL_RATE_ VER3(Full-rate VER 3), HALF_RATE_ VER1(Half-rate VER 1), HALF_RATE_ VER2(Half-rate VER 2), HALF_RATE_ VER3(Half-rate VER 3), FULL_RATE_ VER5(Full-rate VER 5) Unit:None Actual Value Range:FULL_R ATE_VER1, FULL_RATE_ VER2, FULL_RATE_ VER3, HALF_RATE_ VER1, HALF_RATE_ VER2, HALF_RATE_ VER3, FULL_RATE_ VER5

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Parameter ID

NE

5 Parameters

MML Command

Feature ID

Feature Name

Description Default Value:FULL_R ATE_VER1:1,F ULL_RATE_V ER2:1,FULL_R ATE_VER3:0, HALF_RATE_ VER1:1,HALF _RATE_VER2: 0,HALF_RATE _VER3:0,FULL _RATE_VER5: 0


BSC6900

SET GCELLSOFT

GBFD-110501

Call Control

GBFD-113301

Enhanced Full Rate

Meaning:Wheth er to forcibly enable the enhanced full rate function. The BSC forcibly enables the function even if MSC fails to support the EFR function when both of the following conditions are met: The A interface does not use IP transmission. This parameter is set to YES. Both the MS and the BSC support the EFR function. GUI Value Range:NO(No), YES(Yes) Unit:None Actual Value Range:NO, YES Default Value:NO(No)

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5 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description


BSC6910

SET GCELLSOFT

GBFD-110501

Call Control

GBFD-113301

Enhanced Full Rate

Meaning:Wheth er to forcibly enable the enhanced full rate function. The BSC forcibly enables the function even if MSC fails to support the EFR function when both of the following conditions are met: The A interface does not use IP transmission. This parameter is set to YES. Both the MS and the BSC support the EFR function. GUI Value Range:NO(No), YES(Yes) Unit:None Actual Value Range:NO, YES Default Value:NO(No)

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5 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

EncodeMode

BSC6900

SET TCPARA

GBFD-115501

AMR FR

GBFD-113301

Enhanced Full Rate

Meaning:Wheth er to improve the voice quality of NBAMR and EFR services. If ECODEC mode is used, the downlink MOS of NBAMR and EFR services is significantly improved. This parameter is used in A over TDM.

GBFD-115502

AMR HR

GUI Value Range:STAND ARD(Standard code mode), ECODEC (Enhanced code mode) Unit:None Actual Value Range:STAND ARD, ECODEC Default Value:STAND ARD(Standard code mode)

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5 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

EncodeMode

BSC6910

SET TCPARA

GBFD-115501

AMR FR

GBFD-113301

Enhanced Full Rate

Meaning:Wheth er to improve the voice quality of NBAMR and EFR services. If ECODEC mode is used, the downlink MOS of NBAMR and EFR services is significantly improved. This parameter is used in A over TDM.

GBFD-115502

AMR HR

GUI Value Range:STAND ARD(Standard code mode), ECODEC (Enhanced code mode) Unit:None Actual Value Range:STAND ARD, ECODEC Default Value:STAND ARD(Standard code mode)

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6 Counters

6

Counters

Table 6-1 Counter description Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278095420

CELL.CALL.S PEECH.VER. 2.REQ.TCHF

A0401B:Suppor ts Call Times of Full Rate Speech Version 2

BSC6900

GBFD-110501

Call Control

GBFD-113301

Enhanced Full Rate

1282423820

CELL.CHAN.B USY.NUM.TC H.EFR.TRAF.A VE

AR3557C:Traff ic Volume on EFR TCHs

BSC6900

GBFD-113301

Enhanced Full Rate

1282423821

CELL.CHAN.B USY.NUM.TC H.EFR.TRAF.O VERLAY.AVE

AR3558C:Traff ic Volume on EFR TCHs (Overlaid Subcell)

BSC6900

GBFD-113301

Enhanced Full Rate

CELL.CALL.S PEECH.VER. 2.REQ.TCHF

A0401B:Suppor ts Call Times of Full Rate Speech Version 2

BSC6910

1282423820

CELL.CHAN.B USY.NUM.TC H.EFR.TRAF.A VE

AR3557C:Traff ic Volume on EFR TCHs

1282423821

CELL.CHAN.B USY.NUM.TC H.EFR.TRAF.O VERLAY.AVE

AR3558C:Traff ic Volume on EFR TCHs (Overlaid Subcell)

1278095420

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GBFD-113201

Concentric Cell

GBFD-110501

Call Control

GBFD-113301

Enhanced Full Rate

BSC6910

GBFD-113301

Enhanced Full Rate

BSC6910

GBFD-113301

Enhanced Full Rate

GBFD-113201


Concentric Cell

17


7 Glossary

7

Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.

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8 Reference Documents

8

Reference Documents

1.

GSM 08.08: "Digital cellular telecommunications system (Phase 2+)"

2.


3.


4.

TFO Feature Parameter Description

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EFR(GBSS16.0_01)

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